Application of Raman Spectroscopy to the Biooxidation Analysis of Sulfide Minerals

Table 2

Summary of Raman transitions identification in terms of main sulfur species on MPE, eMPE, MCE, and eMCE surfaces. (Vn): order of importance in Raman transitions.

Species	Raman peak position (cm^−1)	Reference
Pyrite (monosulfide, S^−)	344 (v2), 380 (v1), 433 (v3)	[4, 21]
	353, 387	[6]
Chalcopyrite (monosulfide, S^−)	289 (v1), 320 (v3), 471 (v2)	[15, 16]
Polysulfides (S𝑛^2−)	from 443 to 480, main at 470 (v1)	[4, 15, 21]
Elemental sulfur (S^0)	150 (v3), 222 (v2), 470 (v1)	[4, 21]
Covellite (CuS, S^−)	267 (v2), 474 (v1)	[14–16]